DE1460674A1 - Two-part clamp for the clamp chains of a frame for fabric or plastic sheets - Google Patents

Description

hf

There·. Km \

Patent attorney
1 Berlin 33, lltisstxafie 7

BEVIS Industries Inc., Providence / Bhode Island (V.St.A.)

Two-part tension clamp for the tension clamp chains a tenter frame for fabric or plastic sheets

The invention relates to a two-part tension clamp and in particular a tension clamp lower part with a device in order to adapt different types of tensioning clamps to this part that must hold fabric or plastic webs, whereby at the same time a new type of pivot pin for the tension chain belongs to the tension clamp.

They are tension clamps for the tension clamp chains of a tenter frame known, which consists of a rigidly connected with a clamping plate designed as a chain link, over the edge the fabric or plastic web reaching away carrier block exist, at the upper end of a by means of a cam-controlled Actuating lever hinged pivotable clamping plate which swings into the position wedging the hand of the web due to its gravity.

The clamps are generally chain links formed by tension chains and serve to grasp the edges a fabric or plastic sheet. The tracks are each driven between two endless ones via a chain wheel Tension chains clamped. The removal of the sprockets from

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each other is often from one end of the stretching machine Ms on the other end quite considerable. Between the sprockets, the chain runs along a track, and you often uses two sets of rails, sprockets, and chains on each individual tenter frame. The web of fabric to be processed is gripped along its two side edges by the clamping jaws of the clamping clamps and depending on the divergence the track gradually stretched towards the delivery end.

Here it is of the greatest importance that the tension clampsL

I and the clamping jaws as a whole remain precisely aligned with one another j when they move the web of fabric so that the from the tension exerted by them on the fabric web is as uniform as possible · If the chain were allowed to "hit", as would be the case if the chain or jaws were not precisely aligned, then a relative Shift between the clamping jaws occur, which has a very adverse effect on the fabric or plastic web would exercise. If the tensioning clamps are attached to or placed on a roller chain, then the task of avoiding hitting or aligning is actually a difficult technical problem. This problem becomes even more complicated when two-piece clamps are used.

When processing fabric webs, it should always be noted that different types of cloth or other material are used.

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different clamps or different clamping jaws require"

Up until now it was generally considered necessary to work with a larger number of stretching or tentering machines. Each of these machines had a roller chain with hundreds of different tension brackets, a variety of bracket types from the so-called pin type to the clamp shoe type with or without an adjuster. The equipment of a roller chain that was provided with a certain type of tensioning clamps presented unusual difficulties insofar as the replacement of the tensioning clamps with tensioning clamps of a different type, which had to be attached to this roller chain, was an extremely cumbersome and time-consuming work. For this reason, several machines have always been used that were equipped with different types of tensioning clamps. In most cases, the clamping frames were then unused, while only a single machine with a loading ^!

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correct stenter was in operation. In the manufacturing facilities ^;

! As a result, expensive floor space had to be kept in reserve for idle machines. Am the purpose of the invention ^; consists in making such a tensioning machine more versatile by providing a device which enables one type of tensioning clamps to be quickly and easily replaced with another type without the need to worry

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the alignment is lost, or that impact effects j

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the chains do not achieve the desired success of the stretching process is achieved, and finally the invention should eliminate the need for tension chain machines Stand around unused and unnecessarily take up floor space.

The object of the invention is primarily to be achieved, a tensioning device for tensioning clamp chains on machines to be designed with tensioning frames for fabric or plastic sheets in such a way that they can cope with very strong tensile forces are. In the known machines of this type, there is often the risk that with very strong tensile stresses that the tensioning clamps or the with these in connection, directly on the transport chain links attached base parts after the tissue to overturn, or that attachment between the structure of the Clamp and the base part loosened during operation will.

The means provided by the present application to the solution

this task are disclosed, consist in that the mentioned base part, which in a known manner according to the clamped fabric or plastic web to and perpendicular to its surface on a rail of the fixed clamping frame has adjacent guide surface, at its perpendicular

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to the guide surface, designed as a base for the clamping clamps that can be screwed to it its edge located in the vicinity of the said guide surface is provided with a retaining bar, which is stepped off from the surface of the overpiece and on the one accordingly profiled edge of the lower part of the clamp rests in such a way that at this point the essential Part of that exercised by the fabric or plastic sheet Tensile force is absorbed.

Through the interaction of these characterizing the invention Means is achieved that initially the base part of each clamp i with its guide surface so immovable on the there is a fixed rail belonging to the overall arrangement that even with the strongest clamping forces, the age of the base part and

j Tension clamps are preserved and neither tilting nor any other I

constant change of position of these parts or the transport chain links is possible. The invention in particular! also avoided that the fasteners, through which the clamp is connected to the base part, in the course ^

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loosen up over time because they are exposed to stress they cannot cope with.

Xn of the drawing kept in exemplary form, in the same Parts are identified by the same reference numerals

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a schaubildEche representation in rear view of a two-part clamp with swivel base, gate and rotatably arranged clamping jaw,

FIG. 2 shows a diagrammatic representation of the tensioning clamp according to FIG -Pig. 1 in front view,

J? Igo3 a diagrammatic representation of the base part of a two-part clamp according to the invention,

Fig. 4 is a view of a vertical section along line 4-4; of Fig. 2,

Fig. 5 is a plan view of two base parts of a tension chain j with clamp,

I Fig. 6 is a diagrammatic representation in exploded re)

there would be the base parts with a tension chain, ·!

7 is a diagrammatic representation of a modified one Execution of a clamp with swivel base and gate according to the invention, the clamp being detachable is attached to the base part according to Figure 3,

8 shows the view of a vertical section along line 8-8

of Fig. 7, - -. .

9 is a perspective view of a modified embodiment of the clamp part according to the invention, which is located at the upper end and which is also can be releasably attached to the base part according to FIG can, and

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Fig. 1o is a diagrammatic representation of a modified one Execution form of a basic part

In the individual figures of the drawing is the base part denoted by 10 · Br has a front surface 11 and a floor 12 which is made in one piece with this part and which runs approximately at right angles to the front surface 11 and from this protrudes backwards, as well as an upper 'part 13' which is also made in one piece with the front surface 11 consists and is practically parallel to the ground; it runs approximately at right angles to the front surface 11 and protrudes from this to the rear.

The upper part 1? has a step, which consists of a wall running parallel to the surface 11, and also a fitting surface and a rear part 2o. ^- There is a recess in the mating surface, creating a groove-like recess 18 and the mating surfaces 15, 15 ^ along the front edge 16 and the rear edge 17 · In the mating surface per 15A there are several screw threads 21, 22.

There are two vertical bores 7 and 8 in the base part 10 available. Each of these bores consists of an upper section, which lies in the upper part 13, and of one aligned lower portion in the floor 12

Roller members 23 and 23A consist of lower plates 24, 24A, upper plates 25,2JjA and Ab stand sleeves 26,26A and

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27, 27A. Spacer sleeves 26 and 27 are both on the lower

24
The spacer sleeves 26Δ, 27A are attached to the lower plate 24A and to the upper plate 25A , 33 aufο The roller members 23, 23A have of course been known per se for a long time.

j a novel and advantageous use of a pivot pin for ^j i Geinäss a special concept of the invention is carried out, the roller members 23, 23A, to connect this with the base member rotatably j 10th This device consists essentially of "T" -shaped trunnions with the shafts 36, 37 and the heads 36A or 37A, which for example have no square iOrm. The pivot pins 36, 37 can be slidably inserted into the vertical bores 7 and 8, respectively, so that the square heads 36A, 37A lie in the groove-shaped recess below the pin 15, 15A. The leading edge 16 and the trailing edge 17 prevent the square heads 36A, 37A from rotating. The pivot pins 36,37 are held in the vertical bores 7,8 exclusively under the action of gravity.

The base part 10 forms part of an endless chain of roller links 23, 23A, which in turn also form a part the endless chain. The roller members 23, 23A are rotatable in a new and advantageous way with the base

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part 10 connected.

The roller members 23, 23A are slidable between the
Bottom 12 and the upper part 13 arranged, wherein the
31,33 corresponding respectively with the vertical bores 7 _e are aligned. 8 During assembly, the pivot pins 36, 37 are then passed into the vertical bores 7 and 8, respectively
the bearing points 31 or 33 fall so that they can reach the lower section of the corresponding bores 7 and 8! the lower surface of the heads 36A, 37 · ^ in the groove-shaped j

i recess 18 lie. If you want the roller member 23 of the.

Remove the base part 10, then the pivot pin 36 ^; only raised from its position in the vertical bore 7 in, the height. This avoids riveting
of the pivot, and the pivot itself can be larger and
are made stronger than with the previous clamp constructions.

From the abundance of previously known clamps is in the
Drawing a clamp 50 has been picked out, the j from a horizontally lying clamp base 51, a vertically upwardly projecting support bracket with a pressure arm 51 and
consists of a pair of arms 53,54-, which protrude laterally as a junction4 setting of the upwardly protruding trestle, the

lies in front of the pressure arm to lay over the Klaemerboden 51, \

i and a movable clamping jaw 55 * a pivot 56

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lies in special bearings in the pair of arms 53 »54. The clamping jaw 55 is free to move or loosely on pivot pin 56 hinged so that it normally automatically comes into the vertical position, while the clamp base 51 its maintains horizontal position; this position can be the clamping jaw under the .Influence of gravity or under the . Influence of a spring 57, which then take the force of gravity supports. The horizontal bracket base has a mating surface 48, a leading edge 47 and a surface 46 for i Creating a scope. ;

The movable clamping jaw 55 is equipped with an operating lever 2o, which by a (not shown) cam actuated wLrd, which pivots the clamping jaw 55 so that it!

separates from the material (fabric or film). '

The clamp gate consists of a swivel foot 59 which is rotatably mounted in the clamping jaw with the aid of an axis 61 is. The swivel foot or clamping shoe 59 is provided with a counterweight and also points to each other aligned bearings 62, 63 on. The clamping shoe 59 has a ' Clamping shoe surface 64 which terminates in a curved surface 65; the center of which lies in the vertical center of gravity of the clamping shoe 59. The vertical focus is behind the vertical center of axis 61. With reference to fig.1, 2 and 4 you can easily see that the swivel foot 59,

i the actual clamping area 58 by way of a pendulum movement j

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achieved, which is made possible by the pin 56 and the axis 61 i will.

The swivel foot 59 has a shoulder 66 which j must be large and heavy enough to counterbalance I.

form in such a way that the body of the swivel foot is freely attached to the ' Swing axis 61 and the shoulder 66 can hang down to initially reach the actual clamping area 58 and the clamping shoe surface 64- for cooperation with the clamping area Bring 5Ö.

This clamp clip is the subject of US patent 3,023,479, which was granted to the inventor of the subject matter of the invention on March 6, 1962 » '

The support bracket 52 can have a circular recess 69, and a projection 68 can be provided on the movable clamping jaw 55. With the help of this device, a coil spring 57 can be inserted into the upper part so that it lies between the circular recess 69 and the projection 68 in order to support the force of gravity and the clamping jaw 55 and the clamping shoe surface 64 in the clamping area 58 in the JFig _e 1,2 and 4 to move the position shown when the operating lever 2o is out of engagement with the (not shown) cam. As can readily be seen from the drawing, the clamping shoe surface 64 detects the web of a fabric or film that is placed between the clamping

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shoe surface 64 · and the clamping area 58 lies.

This auxiliary force, which is a helical spring in the selected embodiment, is in the USA patent application No. 161 177 of December 21, 1961 by John Crandon Wash im each described in more detail.

The previously common and widespread embodiment of a support bracket for clamps is shown in the -Fig. 7 and 8 of the drawing shown in detail, while a support bracket with pin clamp plate in - ^ ig _e 9 is shown. The instep I

clip according to the present invention is a further development of the tensioning clip according to US Pat. No. 3,058,191 ^;

from 16.0ktouer 1962. This clamp is the real one Grip element with the base ax through a aligned, which is aligned for the purpose of engaging with the surface, 'which touches the guide, to the Aus! direction in the transverse direction, with the lateral alignment being carried out by a pair of nozzles.

The main advantage of the subject matter of the invention is that it creates a two-part clamp for the first time which not only withstands greater tensile forces 4 which are exercised by the tissue to be tensioned, rather

if he also allows a much more rapid substitution used or broken chain links without the need to remove the tension chain from the sprockets or from to be taken out of the clamping frame and for the purpose of

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to bring the temperature to a remote location.

7 and 8 show an embodiment of the upper part 5QA of the two-part tensioning clamp according to the invention. This upper part consists of a horizontally lying clamp base 51A, a vertically standing pressure arm 52A of the carrier block and a pair of arms 53A and 5 ^ -A- which protrude laterally from the carrier block body and lie above the base part, as well as from the movable one Clamping jaw 55A. A pivot 56A lies in the pair of arms 53Α, 5 ^ Α. The clamping jaw 55 A with the actual clamping surface 55 B is hinged to the pivot pin 56 '"A in such a way that it normally swings freely and can be set in the vertical position with respect to the clamping area 58, which results on the horizontal bottom part 51A and exclusively The movable clamping jaw 55A has an actuating lever 20A which can be actuated by a cam (not shown) which in turn pivots the clamping jaw 55A so that it comes into the position in which it holds the material The material is clamped and gripped between the clamping area 58A and the clamping surface 55A .. The horizontal clamp base 51A has a mating surface 48A, a guide edge 47A and a surface 46A for creating a clearance.

Figure 9 shows; a shape of the upper part, commonly called Pin clamping claimner known and in the drawing with 50 B

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is designated. -Br consists of the horizontally lying floor-i part 70 with the mating area 48C, a ferry carite 71 and a forward protruding plate 72. The plate 72 has a number of pins 73 on which the actual elements to hold the material. The bottom part 7o has two bores or mouths 74, 75, the ^ wec will be explained in more detail below.

A modified embodiment of the base part 10A is shown in FIG • Fig.1o shown. It has a front surface 11A, one with this one-piece bottom part 12A, which runs practically at right angles to the surface 11A and from this extends out to the rear, while an upper part 15A is made in one piece with the front surface 11A and runs parallel to the bottom part 12A and approximately perpendicular to the front surface 11A and also extends from this extends backwards.

The upper part 1JA has a step on the one hand a wall 14A which is parallel to the surface 11A, and also of a mating surface I5B and a rear Part 2oA. A number of screw threads 21A and 22A are located in the mating surface 18A.

The front surface 11A has cutouts 80, 81 or windows. ^w T "-shaped pivot pins with square heads 36B and 37B are slidably located in vertical bores, similar to the embodiment according to FIG.

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Approximate shape according to Fig.io is .die groove-shaped recess 18 replaced by mouths that are adapted to the square heads 36B and 37B. These mouths have such a shape that they can change that of the square ones Heads turn and on the other hand turn below the plane B. '

The roller members 23B, 230 consist of the lower plates j 24B, 2A-C and the upper plates 2 ^ B, 25Cj, and in contrast to the spacer sleeves 26, 2 / SA in Figures ₀ 1 to 6; the roller members 26B, 260, 27B, 270 rotatably mounted on the corresponding pivot pin, so for example the roller; link 2? B rotatable on the pin with dejm (jiadratischen head 36 B and the ball member 270 rotatable on the pivot which has the square head 37 B. The roller members 27 B j and 27Ο protrude through the window-shaped recesses 80 ", 81 _; around your part instead of the front surface 11 to come into contact with the guide track (not shown), while in the embodiments according to FIGS. 1 to 5 cLie

Front surface 11 comes into contact with the guide track (not shown).

In practice, the tensioning chain of a tensioning machine is assembled by first laying out a large number of base parts 1 o. Each single base \ 1o is adjacent to the base portion on opposite sides by means of roller members 23 or _e ^23A; tied together. Figures 3 and 5 show this arrangement with

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particular clarity. The tension chain assembled in this way is then placed on the sprockets of the (not shown) Tensioning machine placed in such a way that the guide rail comes into contact with the front surface 11, so that the (not shown) Guide bar of the tenter with the whole chain is in sliding engagement.

As you can see, the base parts 1o are completely independent of the upper parts, so that one can choose from the large number of available tops can select the type that is best suited for tensioning the web in question is. The individual figures in the drawing clearly show that the pivot pins 36, 37 are simply lifted can be taken out against the action of gravity in order to take out a base part or in this way to be able to change a limb. In addition, it is very clear that large savings are achieved as a result that one always only needs to exchange one top for another top, regardless of whether it is Damaged top, wear and tear, or breakage of any type of top.

The upper parts are connected to the lower parts in the following way:

For example, an upper part or a gate clamp, as shown in FIGS. 1, 2 and 4, can be placed on the base part 1o in such a way that the mating surface 4-8 on the mating surfaces 15> 15A (- ^ Fig. 3 ) rests and on their heads ^ n

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3bA, 5? A of the pivot pin in alignment with edge 47
to lie koumit, where it rests against the wall 14. Now we know the two screws 9o through the holes in the horizontal
lying bottom part 51 pushed through to interact with the screw threads 21 and 22 and in this way
the gate clamp 5 ° to the base member can tighten 1o \ iu. The tensile force of the material of the fabric or film web onto the Spannklaminer 5o with gate is exerted in the direction of \ arrow in Figure 4, and the wall 14 acts against ^the; Stress on the edge 47 used for alignment in the direction of this arrow. But that means that the screws 9o; for their part, there is no need to take up any stress in the clearing of the drawn part. The wall 14 can be carried out as massive \, as required, to the tensile force; of the material. Bring the screws 9o
the upper part 5o with the base part 1o either in the side
■ Direction of alignment or in a direction perpendicular to the tensile force of the material as it passes through the
Arrow in -B ¹ Ig.4 is indicated.

In a similar way, the top is made according to the -Fig.? and 8 | so attached to the lower part 1o that the mating surface 48A | 15 »15 A. rests on the corresponding mating surfaces and the

i square heads 36A and 37A of the pivot pins as well as the escape edge 47A, which rests against the wall 14, is covered. Two screws go through the holes 95 »96 in the horizontally:

pass through the bottom part 51A and are screwed into the screw threads |

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i 21, 22 screwed in so that they attach the gate clamps 5oA to your base part 1o and push them downwards ..

Also ax Uy annklammer 5oB after ^ igo9 is placed on the part 1o and attached to this j ^ aas the P <xsa flat 4cSG rests on the fitting surfaces 15, 15a, and that rushing square heads 36A, 37-A. and the -tfluontkunte 71 * which abuts the wall 14 are covered. Two. Screw example dxo screws 9o go through the prepared holes on 7 ^ - »75 hindurchund into the screw threads 21,22 and thus provide the link-acres of Spannalammer 'aB _una the base part 1o forth and push the former down?.

one can easily see that the upper part of the cratter clamp, for example the upper part 50A, can be used according to the -B ¹ Ig ₀ 7 ^u ßd · 8 or the clamp clamp 5oB in the same way on aem base Part 1oA is attached to the base part 1o like all other parts.

The heads 36A, 37A of the pivot pins with the shafts 36 and 37, respectively, have the shape of a "T" in the embodiment shown. It goes without saying that, instead of these square heads, other heads can also be used, i.e. also heads with a shoulder, hexagonal heads or button-like heads or any other iOrm that makes it possible to reduce the fact that the tenon is in the vertical fi direction rotates. Any rotation of a pivot in a vertical hole causes undesirable wear on the pivot, or because:

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Hole, whichever part is made of the softer material consists. .

In the above description, the invention is referred to on the drawing on the basis of some preferred embodiment forms have been described. Bs is understood from the side, however that every person skilled in the art can make changes to the subject matter of the invention ' can make that can be carried out without therefore having to leave the scope of the invention.

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Claims (3)

- 2ο - Claims 1ο Two-part tensioning clamp for the tensioning clamp chains of a Machine with tensioning frame for fabric or plastic webs, containing a base part to which it is detachably attached one across the .Rand of the fabric or plastic web Clamp sits, at the upper end of which a pivotable clamping jaw is articulated, which is due to its gravity in the hand of the train wedging it 1 / age swivels in, characterized in that the base i part (1o), which in a manner known per se according to the j ι stretched fabric or plastic web to and perpendicular to the j whose surface has a .Fu ungsf surface (11) resting on a rail of the fixed clamping frame, on its perpendicular to the guide surface, as a base for the clamp (5o) that can be screwed to it formed upper piece is provided with a retaining strip (14) on its near the J & Hihrungsflache (11), which is stepped off from the surface of the upper piece (13), and on which a correspondingly profiled edge (4-7) of the lower part of the Clamp (5o) is applied in such a way that the essential part of the tensile force exerted by the fabric or plastic web is absorbed at this point. 2 «Clamp according to claim 1, characterized in that the ^ old screws (9o) through the Spanoklaaser - 21- 90 9 88 U / 046ü Documents (Art. 7 S l. 2 No. I sentence 3 of the amendment act. v. 4. 9.1967) ORIGINAL H60674 is connected to the upper part (13) of the base part (io), on the side facing away from the fabric or plastic sheet the retaining bar (14) are arranged. 3. opannklammer according to claim 1, characterized in that in the upper part (I3) of the base part a parallel to the retaining bar (14) extending recess (48) of pins (36,37), which the transport chain links (23 _f 23A) with connect to the base part. 4, clamping clamp according to claim 3 »characterized in that j that the base part (1o) is parallel to the overpiece (13)! and at a distance below this lower piece (12) 'which is provided with openings that lead to the ^! Openings (7 »8) in the upper part are aligned and act as a counter bearing
serve for the pin (36,37). j 5 ". Clamp according to claims 3 or 4, characterized in that the heads (36A, 37A) of the pins (36,37) der- ^; art, especially square, are designed that the
Pin held in the base part (1o) incomparably
will. 9 ~ 0 9 8 84/0 460